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This paper deals with the problem of secure transmission in downlink beamforming. In this paper, a base station, which usually serves information to an amount of users, wants to transmit a confidential message to one of the users. Focusing on the beamforming solution, the authors derive all possible weighted solutions. With this, each non-intended receiver has an importance factor and, therefore, the resulting beamformer is able to properly reconfigure its secure transmission varying the weighting factors.
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